Breath taking resolution, eye popping images wide open.
A joy to hold and use.
Replaced my Nikon 200 f2 with this for portraits.
Easier to focus through viewfinder than the Zeiss Otus 55mm

Cons:

There are no cons. Period

Throw away your bulky 200mm f2 or the 70-200. Get this lovely-to-hold smaller lens for awe-inspiring images shot wide open.
The bright image in the viewfinder is easy to manual focus.
If you can afford the best for FX then look no further